Bookkeeping machine



March 14, 1933. J BUNKER BOOKKEEPING MACHINE Filed Sept. 8. 1924 17 Sheets-Sheet 1 wane March 14, J. G BUNKER BOOKKEEPING MACHINE Filed Sept. 8. 1924 17 Sheets-Sheet 2 March 1933- J. G. DUNKER aooxmmrmcmomma Filed Sept. 8, 1924 17 Sheets-Sheet 3 March 14, 1933. J DUNKER BOQKKEEPING' MACHINE Filed Sept. 8, 1924 17 Sheets-Sheet 4 witness.-

14,1933. J. G B K BOOKKEEPING MACHINE Filed Sept. 8, 1924 17 Shee tsF-Sheet 5 March 1933- J. G. DUNKER BOOKKEEPING MACHINE 17 Sheets-Sheet 6 Filed Sept. 8, 1924 Mm ch 14, 1933. J. G. DUNKER BOOKKEEPING MACHINE 1'7 Sheets-Sheet 7 Filed Sept.

M 1933- J. a. DUNKER BODKKBEPING CHINE Filed Sept. 8, 1924 17 Sheets-Sheet. 8

witness March 14, 1933. BUNKER BOOKKEEPING MACHINE Filed Sept. 8. 1924 17 Sheets-Sheet 9 J. G. BUNKER BOOKKEEPING MACHINE March 14, 1933.

Filed Sept. 8, 1924 17 Sheets-Sheet 10 witness r NRN March 14, a DUNKER BOOKKEEPING mcuma Filed Sept. 8, 1924 17 Sheets-Sheet 11 March 14, 1933- J. G. DUNKER BOOKKEEPING MACHINE e a h H 4 0b 9 m 1 i 8 .swm 1 mm! M s a m a H u Mil F Zl/z'inees: A

March 1933- J. G. DUNKER noomtzarme :ucxmm Filed Sept. 8, 1924 17 Sheets-Sheet 13 March 14, 1933. J. G. DUNKER a ooxxaarme mcnma Fi led Sept. 8. 1924 1'! Sheets-Sheet 14 J. G. DUNKER BOOKKEEPING ndamz March 14, 1933.

March 14, 1933. J. G. DUNKER nookxnnrme mcama 1'? Sheets-Sheet 1e 1-i1ed Sept. 8, 1924 March 14, 1933.

J G. DUNKER BOOKKEEPING MACHINE Filed Sept. 8. 1924 l? Sheets-Sheet 1'? Witness Patented Mar. 14, 1933 UNITED STATES PATENT OFFICE JOHN G. BUNKER, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, 1'0 THE NATIONAL CASH REGISTER GOHPANY, OF DAYTON, OHIO, A CORPORATION OF mmn BOOKEEPING MACHINE Application med September 8, 1924. Serial No. 786,646.

This invention relates to a combination computing and tfpewriting machine For convenience of il ustration and description, the mechanism comprising the present 1nvention has been incorporated in the structure of the Ellis adding-typewriter, WhlCll latter is described and illustrated in the U. S. patent to H. Ellis, No. 1,197,276, dated September 5, 19 16.

The invention consists, among other things, in providin an'improyed comb nation computing an t-ypgwritlng machine, and in providing improved means for comuting. Y

Other ob'ects of the invention are to pro vide a com ination machine of this type of simplified construction; to provide a plurality of accumulators, arranged in grou s, that are adapted to .be operated by a p urality of actuators common to the several accumulators, in a novel manner; to provide novel means for controlling one of said accumulators and its res ctive actuator, whereby the wheels of sai accumulator are automatically returned to zero position for a total, or said wheels arejautomatically returned to zero position, and then back to normal position, for a sub-total.

Preferably, the actuators and the accumulators of the present invention are so arran ed that one group will compute vertica ly the numbers printed across the worksheet, and another group will compute said numbers horizontally.

Another object of this invention is to provide control means comprising a plu rality of disks. These control disks oper-' sections of the embodiment of the invention illustrated,

Fig. 1 is a right side elevation showing the general arrangement of the improved machine, and particularly the clutch mechanism and the parts outside the vertical side frames to which the cross-members. of the machine are attached; I

Fig. 2 is a left side elevation showing the parts outside the vertical side frames, with said parts in their normal positions.

Fig. 3 is a side elevation of the mechanism between the side frames, viewed from the right side, and with certain parts omitted in the interest 'of clearness;

Fig. 4 is a vertical, longitudinal section, showing the typewriter action;

Fig. 5 is a detail side elevation illustratin the actuators, with the parts in their norma positions;

Fig. 5a is a section taken on line 5a-5a of Fig. 5;

Figs. 5b, 5c. 5d, and 5c are perspective views illustrating details of the coupling mechanism that may be provided for the slides and racks;

Fig. 6 is a side elevation, partly in section, showing one arrangement of the actuators, accumulators, and carrying mechamsm;

Fig. 7 is a detail and view illustrating one means that may be employed for reversing the direction of rotation of the accumulating wheels, andFig. 8 is a similar view illustrating another type of means which maybe employed if desired; D

Fig. 9 is a detail side elevation partly in section, of the accumulator locking mechanism, and Fig. 9a is an end view of the parts illustrated in Fig. 9;

Fig. 10 is a perspective illustrating an accumulating wheel and one type of cam that may be employed for carrying and totaliz- Fig. 11 he detail perspective of the accumulator engaging mechanism; a

Fig. 12 is a detail view illustrating the accumulator locking and releasing mechanism. Figs. 12a and 126 are a plan and an end view respectively, of the parts illustrated in 12;

Fig. 13 is a detail side elevation of the carrying-tens mechanism with the actuators omitted, while Figs. 13a and 136 are a top plan view and an end view, respectively, of the parts illustrated in Fig. 13;

F g. 14 is a detail side elevation of the carrying-tens restoring mechanism, while Figs. 14 and 14b'are a top plan view and an end view, respectively, of the parts illustrated in Fig. 14;

Fig. 15 is a detail side elevation of the actuator coupling mechanism, while Fi s. 15a and 151) are a top plan view and an en view, respectively, of the parts illustrated in Fig.

Fig. 16 is a detail side elevation of the aligning and releasing mechanism for the accumulators of the upper group. This view also discloses one type of means which may be employed for automatically actuating the escapement of the paper carriage;

Fig. 17 is a detail side elevation illustrating means for actuating the carrying mechanism, for releasing the accumulators, for restoring the carrying mechanism, and for releasing the upper accumulator reel; while Figs. 17a and 176 are a top plan view and an end view, respectively, of the parts illustrated in Fig. 17;

Fig. 18 is a detail side elevation of the alignin mechanism for the upper group of accumu ators; Fig. 18a is a section taken on the line 18a18a of Fig. 18, and Fig. 18b is-an end view of the parts illustrated in Fig. 18;

Fig. 19 is a detail side view illustrating one type of means that may be employed to en age the accumulators with their respective act ators;

Fig. 20 is a detail side view of the computing control mechanism for the upper actuator;

Fig. 21 is a detail end view, certain parts being broken away, of the gear wheel shifting mechanism, while Fig. 22 is a erspective detail of the left-hand portion of ig. 21;

Fig. 23 is a detail side view, similar to Fig. 20, illustrating the computing control mechanism of the lower actuator and Fig. 23a is an end view of the parts illustrated in Fig. 23; V

Fig. 24 is a detail side view of the upper and lower computing control disks shown in Figs. 20 and 23, while Fig. 24a is an end view of the parts illustrated in Fig. 24; v

Fig. 25 is an assembly view, in side elevation, of the means for reversing the computing operation of the machine;

Fig. 26 is a detail perspective of the paper carriage tabulating mechanism for disengaging the escapement;

F igs'. 27 and 28 are perspective views of a sleeve and key, respectively, that may be cmpltiyed for assembling the control disks;

ig. 29 is a detail side view of the disk shown in Fig. 16 assembled with the sleeve and key illustrated in Figs. 27 and 28, and Fig. 29a is an end view of the parts illustrated in Fig. 29;

Fig. 30 is a detail side view of the disks illustrated in Fi s. 16, 20 and 23 assembled in a group, and ig. 30a is an end view of the parts illustrated in Fig. 30;

Fig. 31 is a detail view of a portion of the mechanism that is rovided to release and to lock the operating ar;

Fig. 32 is a perspective view of means which may be employed for moving the numeral key releasing bar;

Fig. 33 is a side view of the manual means for engaging the aligned upper accumulator with the upper actuator during totalizing operation;

Fig. 34 is a side'view of the manual releasing and locking mechanism for the'upper accumulator that is actuated during totalizing operation;

Fig. 35 is a side view of the automatic releasing and locking mechanism for the up er acc mulator that is actuated during a tota izing operation;

ig. 36 is a detail side view of mechanism for locking the actuators during a totalizing operation ig. 37 is a side view of automatic means for engaging the aligned lower accumulator with its actuator during a totalizing operation, and

Fig. 38 is a detail side view of mechanism to control the printing ribbon.

1. Glutcit mechanism Illustrated particularly in Fig. 1.

In the Ellis atent referred to, the machine is operated by a handle and in the present machine, by an electric motor, Referring to Fig. 1, an operating bar 1 is connected to a circular piece 3 by a short link 2 and to a three-armed lever 6 by a long link 5. The circular piece 3 is pivoted to the side frame B46 on a pivot 4 and the lever 6 on a pivot 7 A stud 8 projecting from an arm 9 on the lever 6 engages a slot 10 cut in a clutch-detent 11, pivoted at 12 on the clutch housing 600. Depression of the operating bar 1 disengages the stud 8 from the slot 10 and a spring 13 elevates 8. lug 14, formed on the rear end of the clutch-lock 11, to release a lever 15, which lever is pivoted at 16 to a revolvable disk 17 journalled on a short shaft 18 projecting from the clutch housing. One end of a steel clutch band 19 is secured to the disk 17 and the other end is connected to the lever 15 by a stud 20 projecting inwardly from said lever.

Continuousl rotated by a motor, (not shown), is a s aft 21 and a worm 22, which worm meshes with a worm-gear 23 journalled on the short shaft 18 and havin anannular flange 24 to house the steel-c uteh band 19. When the lever is released the steelclutch band is forced against the inner wall of the ring 24 by a spring 25 connected to said lever'and a stud 26 in the disk 17. This friction clutch rotates about the short shaft 18 until the lever 15 is arrested by the lug 14. To reset the clutch lock 11, an adjustable stud 27 secured to the revolvable disk 17 engages with a cam 28 formed on the clutch-' the clutch housing prevents lock as the disk rotates. This action forces the slot end of the clutch-lock u and the stud 8 en ging the slot resets the c utch-lock until t e operating bar 1 is again depressed. e circular piece 3 and the three-armed lever 6 are moved to their normal positions by a sprin 29', as shown in Fig. 1. With the clutch ock reset, the lever 15 shouts on the lug 14and disengages the steel-clutch band 19 from the wide rm ing worm-gear 23. A late 30 mounted on recoil of the clutchmechanism 'by holding the stud 27, while a block 31 projecting from the base B limits the downward movement of the clutch-lock 11 when said clutch-lock is released from the stud 8.

A drive link 32 connects this clutch with the mechanism of the machine so that one revolution of the worm-gear 23 makes a complete operation of the machine.

2. Typewritzlng mechanism Illustrated particularly in Fi s. 1 and 4.

S designates a platen, rotata ly mounted in a laterally moving frame C45, which hereinafter. as a unit, is termed the pa er-carriage. The paper-carriage is move step by step in one direction b aspring and an escapemfent, as is usual in typewriting-machines. Means are hereinafter described to manually and automaticaly disengage the esca ement to permit the paper-carriage to tabu ate from one printing position to another through a plurality of letter spaces at a time.

Thetypewriter mechanism in this machine com rises a three-piece t pe movement, clearly s own in Fig. 4. T e key lever T68, in this case, a lever of the first class, is pivoted at T94, in a suitable slotted fulcrum bar T47, secured to the base B45. This pivot T94, is at an intermediate position between the key top at the forward end, and a roller T41 at the rear end of the lever T68. This roller T41 traverses a cam slot in the lower end of an intermediate lever T67, which is pivoted in a horizontal slotted bar T48, on a wire T91 extending across the series of slots in the bar T48. The upper end of the intermediate lever T67 carries a projection T17 which travels in a slot in the heel of a typebar T66 is pivoted at T92 in a slotted type 24, of the rotat bar segment T45, which "also supportsthe I ty e-guide T75.

he depression of a key lowers. the forward end of the lever T68 and elevates the roller T41 which working in the cam slot at the lower end of the intermediate lever T67, rocks the last-named lever and its projection T17 in counter-clockwise direction. The projection swings the type-bar T66 from its position of rest, as shown in Fi 4, until the type on its fore-end strikes t e platen S. The bar T48, for su portin the pivot T91 of the intermediate levers 1 67, extends be tween and is secured at its 0 posite ends to the side frames B46 and.B4 The key levers T68 are held in, and restored to, their normal positions, by springs T80 extending between the lower edges of said levers and suitable adjusting screws in the base B45.

3. Number printing device Illustrated particularly in Figs. 1, 3, 19 and 35.

The keyboard comprises denominational rows of keys K51 to K59, re resenting the numerals 1 to 9. From each keystem K51 to K58, inclusive, projects a stud K23 to difi'erentially arrest a slide R50. The slide moves backand forth in the machine supported on a stationary cross rod K3, extending across the machine under the keyboard, and past a cross-bar R92 embraced by therear forked end of the slide; both the rod K3 and the bar R92 being provided with suitable grooves in which the slide R50 can move; the grooves serving as guides to maintain the slide B50 in its vertical position. On the upper edge of the slide R50, beginning near the front end, are a series of graduate steps which serve as the abuttin surfaces to engage the series of key studs 3. The various steps on the u per ed e of the slide R50, are so arranged t iat eac step engages a particular one of the studs K23, which latter are also arranged at difierent heights or in a step formatio The key studs K23 arrest the slide R50 at different points in its travel; for instance, the enga ement of the slide R50 with the stud K23 on t e keystem K51, arresfs the slide R50 after the latter has moved to the rear a distance of one step which is equivalent to the distance between two adjacent types of the printing ty e-sector P54. If for instance, the keystone 54 is depressed, the slide R50 will move to the rear until it engages the stud K23 on the keystem K54, and

there will be a movement of four steps to paper carriage 1n the e keystem K59, does not 

